Imported conductivity meter purchase guide introduction

First of all, let us first understand a few concepts, what is the conductivity? Conductivity is the conductivity of water, the reciprocal of the resistance of water, which is commonly used to indicate the purity of water. The measuring electrode of the imported conductivity meter must be made of chemically resistant material. Materials such as titanium are often used in manufacturing. A measuring electrode consisting of two electrodes is called a Kohlrausch electrode. When purchasing an imported conductivity meter, you should pay attention to the following points:
1. Form of measurement: Conductive and inductive. When using a conductivity electrode, it is necessary to select a suitable electrode constant "K".
2, the pressure related to the mechanical structure, pressure is also a factor to be considered in the conductance measurement, usually around 0.6MPa, excessive pressure will cause damage to the sensor.
3, the measurement range of the conductivity electrode, usually the industrial medium measurement range is between 0 and 20ms / cm, the selected electrode and accuracy requirements are also different.
4. Factors that need to be considered are: the chemical resistance of the conductivity electrode, the chemical influence on the sensor (such as strong acid and alkali in the medium), and the type of measuring medium are all determined.
5, the temperature of the measured liquid, usually measured medium temperature range is between 0 and 60 ° C, if the measured temperature is beyond this measurement range, contact the manufacturer to ask which sensor is suitable for the detection of their own media.
6. All measuring cables must be shielded. Especially for the conductance electrode (the electrode has direct contact with the solution to be tested), when the conductance value is higher than 100 mS, the influence of the cable length and the cross-sectional area of the cable needs to be considered, because the resistance of the cable is also in the measurement loop. in.
7, the installation structure (thread, flange, three chuck connection, etc.), conductivity sensor has a variety of installation methods, need to take into account the accuracy of the measurement, the determination of the site environment, otherwise it will affect the measurement results.